Reduced-profile slide and lock stent
First Claim
1. An expandable slide and lock stent, the stent comprising a tubular member having circumferential and longitudinal axes, the stent comprising:
- a first backbone;
a second backbone;
a third backbone;
each of the first, second, and third backbones extending along at least a portion of the circumferential and the longitudinal axes, and each comprising;
an open bond slot in a first portion of the respective backbone;
a closed pass-through slot in a second portion of the respective backbone; and
a recessed nesting area in a third portion of the respective backbone;
the first portion being radially thinner than the second portion and being radially thinner than the third portion; and
the third portion being radially thinner than the second portion;
a rail member extending along at least a portion of the circumferential axis, the rail member comprising proximal and distal ends, wherein;
the proximal end of the rail member is coupled to the first backbone at the open bond slot of the first backbone;
the distal end of the rail member extends from the first backbone in a circumferential direction through the closed pass-through slot of the second backbone; and
the rail member being slidably interfaced with the recessed nesting area of the third backbone;
wherein the rail member is configured to provide one-way movement of the second and third backbones away from the first backbone such that the tubular member can be expanded between a collapsed diameter and an expanded diameter.
2 Assignments
0 Petitions
Accused Products
Abstract
An expandable slide and lock stent comprises a tubular member that can be expanded from a collapsed state to an expanded state. The tubular member can comprise a reversing helical backbone and at least one rail member extending from the helical backbone in a circumferential direction. The backbone can have at least one engagement element that can be configured to receive a rail member to form the tubular member. In some embodiments, the reversing helical backbone can comprise a plurality of discrete segments having a variable profile and/or wave form. A plurality of regions of each backbone may have a recessed or “nesting” profile providing for a smaller overall stent profile in a compacted configuration, and improved stent retention as mounted on a balloon catheter.
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Citations
20 Claims
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1. An expandable slide and lock stent, the stent comprising a tubular member having circumferential and longitudinal axes, the stent comprising:
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a first backbone; a second backbone; a third backbone; each of the first, second, and third backbones extending along at least a portion of the circumferential and the longitudinal axes, and each comprising; an open bond slot in a first portion of the respective backbone; a closed pass-through slot in a second portion of the respective backbone; and a recessed nesting area in a third portion of the respective backbone; the first portion being radially thinner than the second portion and being radially thinner than the third portion; and the third portion being radially thinner than the second portion; a rail member extending along at least a portion of the circumferential axis, the rail member comprising proximal and distal ends, wherein; the proximal end of the rail member is coupled to the first backbone at the open bond slot of the first backbone; the distal end of the rail member extends from the first backbone in a circumferential direction through the closed pass-through slot of the second backbone; and the rail member being slidably interfaced with the recessed nesting area of the third backbone; wherein the rail member is configured to provide one-way movement of the second and third backbones away from the first backbone such that the tubular member can be expanded between a collapsed diameter and an expanded diameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An expandable slide and lock stent, the stent comprising a tubular member having circumferential and longitudinal axes, the stent comprising:
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a first backbone and a second backbone, the first and second backbones extending along at least a portion of the circumferential axis and along the longitudinal axis, the first and second backbones each having; a first portion; a second portion; and a third portion; wherein each of the portions has a different radial thickness, the first portion being thicker than the second portion, and the second portion being thicker than the third portion; and wherein the second portion is located longitudinally between the first and third portions on the backbones; a rail member defining proximal and distal ends, the proximal end of the rail member being coupled to the first backbone at the first portion, the distal end of the rail member extending from the first backbone in a circumferential direction, the rail member configured to engage with an engagement element in the third portion of the second backbone; wherein the rail member is configured to provide one-way movement of the second backbone away from the first backbone such that the tubular member can be expanded between a collapsed diameter and an expanded diameter. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification